Thread-case for sewing-machines.



No. 663,674. Patented Dec. 11, I900.

y P. mam. & m. HEMLEB.

I THREAD CASE FOR SEWING MACHINES.

(Application filed Aug. 7, 1900.)

. (No Model.)

gul umm/ I $1 T1 .7 WITNESSES: J

W 444 BY My y ATTORNE UNITED STATES 1 PHILIP DIEIIL MARTIN HEM LEE, OFELIZABETH, NEW JERSEY, AS$IGNORS TO THE SINGER MANUFACTURING COMPANY, OFNEW JERSEY.

THREAD-CAST; FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 663,674, dated December11, ieoo.

Application filed August 7,1900. Serial No. 26,139. (No model.)

To all whom it may concern:

Be it known that we, PHILIP DIEHL and MARTIN HEMLEB,ciLiZens of theUnited States, residing at Elizabeth,in the county of Union and State ofNew Jersey, have invented certain new and useful Improvements inSewing-Machine Thread-Cases, of which the following is a specification,reference being had therein to the accompanying drawings.

This invention relates to a stationary bobbin-case or thread-caseadapted for use in connection with a circularly-moving rotating oroscillating hook and peripherally supported by the hook or hook-ringeccentric to the axis thereof,as described in United Statesapplication,Seri-al No.73o,263,flled November 8,1899; and the inventionhas for its object to provide a thread-case having a rib-and-grooveconnection with the hook and about which the needle-loops will becarried by the hook without danger of wedging or catching theneedle-thread between the moving and stationary surfaces, also toprovide a convenient and efficient tension device for the bobbin-thread.

In the accompanying drawings, Figure l is a face view of thecircularly-moving hook and the stationary thread-case with the bobbintherein, the beak of the book being in castoff position relative to thethread-case. Figs. 2 and 3 are opposite side views of the threadcase;Figs. a and 5,opposite edge views thereof, and Fig. 6 is a top plan viewthereof. Fig. 7 is asection on line 7 7, Fig. 3. Fig. Sis a detailsection, on an enlarged scale, to show the tension device; and Fig. 9isa detail section on line 9 9, Fig. 1, of parts of the hook andthread-case.

Referring to the drawings, 5 denotes a hookring or hookto which, in theuse of the invention, oscillating or rotating movements will beimparted, said hook-ring having a loop-seizing beak or hook proper, 8,which inclines inwardly from the periphery of the hook-ring and issomewhat flattened transversely on its under side. The segmentalthread-case or bobbin'case 10, supported by the hook-ring or hook, isprovided on one side witha segmental peripheral flange 91, received inan interior annular groove 75 in the hook-ring 5, said flangeterminating at one end in a loop-dividing book 14, the eX- treuie pointof which is housed in said groove, the notch 76 of said hook receivingthe bights of theloops of needle-thread carried into said notch by thebeak 8 of the hook-ring 5, so that each needle-loop will be divided bysaid hook 14, and thus one limb of the loop will pass behind thethread-case and the other limb will pass over the front thereof the loopis carried around the said thread-case by the beak of the saidhook-ring. The thread-case is held stationary or rest-rained from movingwith the circularly-moving hook 5, and the flange 91 of the thread-caseis retained in the groove 75 of the hook by a stationary holderextending within the field of the hook-ring or hook, saidholderbeingdenoted by dotted lines in Fig. 1. The thread-case orbobbin-case 10 is provided near its heel portion with a second rib orflange 77, rising gradually from the body of the said thread'case towardthe heel of the latter, where it reaches the height of the segmental ribor flange 91, forming between said ribs or flanges the groove 78, inwhich the flattened inner part of the beak 8 extends, so that the pointof said beak is housed in said groove 78,.as denoted in dotted lines inFig. l, as the said beak carries the needle-thread over the heel of thethread-case. The flange 77, cooperating with the flange 91 and beak 8,thus serves as a thread-guard to prevent the needle-thread from gettinginto the interior groove of the hook-ring, where it might become wedgedbetween the thread-case andhook-ring, and thus obstruct and clog theproperoperation of the machine. When the thread-case is provided withthe guard-flange 77, the needle-thread loop will be pushed or hookoscillating or rotating in a vertical plane, it is held in an uprightposition,.'as

shown in the drawings, and for use in such position it is preferablyfurnished at its upper portion with a tension lever-spring 79, a portionof which is received in a groove formed between two walls or flanges 80and 81, said spring being loosely pivoted laterally between a shoulderon a holding-screw 82 and the wall 81 and the said wall being providedwith an inclined threadingslot 83, leading from its outer to its innerface and to a hole or threadeye 84, formed in the wall of the bobbin:chamber. The tension lever-spring 79 bears at its free or forward endagainst the inner face of the wall 81, and tapped in said wall is an adjListing-screw 85, which bears against the side of said spring at itsother or rear end portion, so that by turning said screw from the outerside of the thread-case the tension- ,pressure of said spring againstthe inner face of the wall 81 may be regulated as desired. The saidtension-spring is provided with a small lip 86, overlying the top of theWall 81 and having a notch 87, which receives and guides theoutwardly-running bobbin-thread and prevents it from becoming displaced.

In threading the bobbin-case the thread is drawn into the slot 83 andhole 84, so as to be between the tension-spring 79 and the inner face ofth e wall 81, and said thread is also drawn beneath the lip 86 and intothe notch 87 of the tension-spring. The tension may be convenientlyregulated without removing the thread-case from the machine by turningthe adj ustingscrew 85, which is accessible from the front of thehook-ring and threadat one end, said peripheral rib or flange extendingfrom said loop-dividing hook to the heel of said thread-case and saidthread-case having adjacent to the other end of said rib or flange andnear the heel of said threadcase a second or guard rib or flangestarting from the surface of said thread-case near the middle of thesaid peripheral rib or flange and rising gradually, toward the heel ofthe said thread-case,to the height of the said peripheral rib or flange,to form, between said ribs or flanges, a groove to receive and house thepoint of the beak ofa circularly-moving book.

2. The combination with a hook-ring provided with a loop-taking beak andwith an interior groove, of a thread-case having at one edge, only, aperipheral segmental rib or flange fitting in said groove and providedat one end with a loopdividing hook the point of which is housed insaidgroove, said threadc'ase having near its heel and adjacent to the otherend of said rib or flange a second rib or flange which rises graduallyfrom the body of the thread-case to form between said ribs or flanges agroove to receive and house the point of. the said beak of thehook-ring.

3. The combination with the thread-case 10 provided at its upper orloop-dividing portion with the separated flanges or Walls 80 and 81,.

the latter having the threading-slot 83, of the tension lever-spring apart of which is received between said flanges or walls and another partof which bears against the inner face of the said wall 81, said springhaving the notched lip 86 overlying the top of said wall 81, and a screwfor regulating the tension of said spring.

In testimony whereof we affix our signatures in presence oftwowitnesses.

PHILIP DIEHL.

MARTIN HEMLEB.

Witnesses:

HENRY J. MILLER, W; IRVING HOUGHTON.

